Re: Mixing Species, or Let's create a novel pathogen!
I've never heard that chytrid could have been caused by the hobby. It is a fungus. Frogs live in probably the worst environments around the world and this fungus likely naturally evolved in the wild. The amphibian trade could have spread the disease but it did not start there.
The mixing of species has always been one of personal view and this is where opinions differ. Not only in the amphibian hobby but in almost animal husbandry. Sometimes it's for the health of the animal. Most times it's other motivations.
In birds, some mutations are unhealthy while others get the best of both and is the start of something new.
I'm not one to either advocate for or against mixing as I know every situation has it's own reasons, but I know Heinekenvirus isn't coming out of tanks.